Method for preparing weather-resisting steel ingot
A weathering steel and weathering technology, applied in the field of ferrous metal smelting preparation and application, can solve problems such as hindering the development and application of weathering steel technology and failing to meet the requirements of weathering steel.
Inactive Publication Date: 2015-06-17
TAIYUAN UNIV OF TECH
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Problems solved by technology
[0004] In the process of preparing weather-resistant steel, in order to meet the high requirements of weather resistance, some methods of changing ingredients, applying pressure, surface treatment, chemical coating, etc., but these methods have different degrees of disadvantages, so that the weather resistance cannot be achieved. Steel requirements hinder the development and application of weathering steel technology
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[0057] The present invention will be further described below in conjunction with accompanying drawing:
[0058] figure 1 As shown, it is the state diagram of smelting, refining, and casting weathering steel. The position and connection relationship of each part must be correct, and the operation should be done in sequence according to the ratio of quantity.
[0059] Quantities of chemical substances used in preparation, smelting, and refining are determined according to preset ranges in grams, millimeters, centimeters 3 is the unit of measurement.
[0060] The smelting, refining, and casting of weathering steel are carried out in a vacuum induction melting furnace. During the process of heating, smelting, refining, and adding weathering materials, it is completed under external water circulation cooling and argon protection;
[0061]The vacuum induction melting furnace is vertical, the bottom of the vacuum induction melting furnace 1 is a furnace base 2, and the upper part i...
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Abstract
The invention relates to a method for preparing weather-resisting steel ingots, aiming at special technique requirements of weather-resisting steel ingots. The method comprises the following steps: heating to smelt an iron-carbon alloy inside a vacuum sensing smelting furnace under the protection of argon, subsequently adding a weather-resisting reinforcing and toughening substance to smelt, casting into ingots, heating and forging the ingots, and annealing at middle temperature so as to prepare the pole-shaped weather-resisting steel ingots. The method is advanced in process and detailed and precise in data, the chemical and physical properties and mechanical properties of the weather-resisting steel are stable, the grain size is 12.3mu m, the extension strength is as high as 836MPa, the yield strength is as high as 721MPa, the impact toughness is as high as 354J, the corrosion rate in a 3.5% NaCl solution can be reduced by 73%, and the method is an ideal method for weather-resisting steel ingots.
Description
technical field [0001] The invention relates to a method for preparing weather-resistant steel ingots, which belongs to the technical field of ferrous metal smelting preparation and application. Background technique [0002] Weathering steel is a kind of structural steel suitable for climate change. Due to the change of climate, the impregnation of rain, snow, fog and ice, the blowing of wind and sand, and the corrosion and beating of seawater will cause changes in the mechanical properties, chemical and physical properties of the steel. As a result, the hardness of the steel is reduced, the brittleness is increased, the wear resistance is deteriorated, and the tensile strength is weakened, so that the parts cannot be used normally, and even cause accidents. [0003] Weathering steel is generally used in the manufacture of train carriages, containers and mobile equipment. Most of these equipment require high strength, high toughness, and corrosion resistance. It puts forwar...
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IPC IPC(8): C22C33/06B22D7/00C21D8/06
Inventor 张金玲王社斌郭端阳许并社贺磊周京姚宪华
Owner TAIYUAN UNIV OF TECH